- It's funny. I remember in the very first
delivery I ever attended, right after the baby was delivered
and the umbilical cord was cut,
I started to unscrub and remove my gloves.
And then I heard someone yell out, "Hey, where you going?
"We still have to deliver the placenta."
So they were right. The delivery of the baby is followed
by the delivery of the placenta,
which usually occurs within five to 15 minutes.
But it shouldn't take longer than 30 minutes.
After 30 minutes, you start to think
that something might be wrong.
And, as you're standing there, with your hand gently,
very gently, holding on to the umbilical cord,
there are four key signs that you look out for
that signal that the placenta is separating
from the wall of the uterus.
So let's talk about what those four signs are.
The first is that the umbilical cord lengthens.
And that makes sense.
The umbilical cord is attached to the placenta.
And if the placenta is detaching from the uterus,
more of the umbilical cord should appear in front of you.
So that's the first sign, that the umbilical cord,
the umbilical cord, umbilical cord lengthens.
The umbilical cord lengthens.
The second sign is a gush of blood.
The second sign that the placenta is separating
from the wall of the uterus is a gush of blood.
Which, if you can visualize it,
the placenta is shearing away
from the underlying endometrium.
And that shear rips apart blood vessels,
causing the bleeding to occur.
And all of this is happening spontaneously.
How? Well, after the baby is delivered,
the uterus shrinks in size,
because the uterus is muscle, after all.
So it has the ability to stretch and shrink really rapidly.
But the placenta isn't a muscle.
It doesn't change shape as ready.
So as the uterus shrinks and kind of retracts away,
the blood vessels in the placenta tear.
So that accounts for the bleeding.
Now, to understand the third and the fourth signs
of placental separation, you have to understand
what I think is the absolute most amazing thing
about the uterus and the placenta,
and that is the structure with which
the muscle fibers of the uterus are arranged.
So, the muscle fibers of the uterus are arranged
in a kind of criss-cross fashion
around the blood vessels.
So, here you have the muscle fibers of the uterus,
and they're arranged kind of in a criss-cross fashion,
kind of like, kind of like a lattice
around the blood vessels.
So when the uterus contracts,
it squeezes on these blood vessels, which have now
been sheared and ruptured, to stop the bleeding.
Without this feature, the mom would probably
die of a hemorrhage from the separation of the placenta.
But the uterus contracting down
on these blood vessels stops the bleeding.
And the third and fourth signs are related
to that contraction of the uterus.
So you feel, the third sign is that you feel,
the uterus feels firm and globular.
So you can actually feel that it's firming up
and that it's more globular, globular in shape, right?
And you also, the fourth sign is
that you're able to feel the uterus rising up
to the anterior abdominal wall.
So you actually feel the uterus contracting
and sort of pushing up, or rising up,
to the anterior abdominal wall.
So why am I going into so much detail about these signs?
Well, it's because we look for them, we wait for them.
Because when they all occur,
we know that the placenta is coming
and we can sort of help the process out.
But sometimes a practitioner can put too much pressure
on the umbilical cord too early, that is,
when the placenta is still firmly attached to the uterus.
And that can lead to inversion of the uterus,
or the uterus sort of turning inside out
and coming out through the vagina.
And that kind of looks like this.
The uterus is kind of turned inside out
because you pulled on the umbilical cord too hardly.
And the best way to prevent this from happening
is to wait til all four signs, not two, not three,
but all four signs of placental separation occur
before you put any traction on the umbilical cord.
But if the uterine inversion does occur,
the very first step is to try to reposition the uterus
back into its normal position.
And that can be pretty challenging
because the uterus is in a contracted position, right?
It's contracted, and that makes it harder to manipulate.
So that's why I will often start off
by using uterine relaxing agents,
so, uterine relaxation agents to first, sort of,
relax the uterus, make it softer, more pliable.
And then, after the uterus is relaxed,
the practitioner will then place the uterus
back into its normal position.
And after the uterus is placed back
into its normal position, we'll usually follow this
with a uterine contracting agent,
or what's called a uterotonic agent, right?
So "utero" meaning "uterus,"
"tonic" meaning "tone," "contraction," right?
So uterotonic agent.
And the uterotonic agent helps to limit the bleeding,
because, again, when the uterus contracts down,
it squeezes off those blood vessels
that are running through it.
And it also helps, the uterotonic agent also helps
to prevent reinversion of the uterus.
So that's why we use it.
Now, another thing, this also
very important to keep in mind,
is that uterine inversion can be accompanied
by a lot of bleeding.
So volume replacement, sort of blood volume replacement,
is a very central part of treatment.
So before we finish off this topic,
I wanna mention a couple of things
that put a woman at risk for uterine inversion.
I already mentioned that putting too much traction
on the umbilical cord is one huge, major risk factor.
Another thing that makes uterine inversion
a lot more likely is having a placenta
that's too firmly attached to the uterus.
And you can imagine, the placenta's too firmly
attached to the uterus, and that makes you,
that would probably make a person
pull on the umbilical cord too hardly, right?
And that condition, where the placenta
is attached too firmly to the uterus,
is called placenta, it's called placenta,
placenta accrea, right?
Or very firmly adherent placenta.
And you can also probably imagine that having
a floppy uterus makes it easier to invert.
So use of uterine relaxing agents
can also increase the risk of inversion.
Okay. So that's uterine inversion in a nutshell,
a condition that teaches us to be,
or reminds us to be, patient and to remember that,
even though the umbilical cord may look like a rope,
we're not playing tug-of-war with the placenta.